Bearing body structure for frequently starting vertical high-temperature molten salt pump

Abstract

The utility model relates to a bearing body structure for frequently starting a vertical high-temperature molten salt pump, which is positioned at the upper part of the vertical high-temperature molten salt pump, is used for positioning and supporting a rotor part of the vertical high-temperature molten salt pump, and comprises a double-bearing structure and a double-cooling structure, the double-bearing structure comprises a thrust bearing and a deep groove ball bearing, and the double-cooling structure comprises a fan and a cooling coil; the thrust bearing and the deep groove ball bearing are both in interference connection with the bearing support, and the thrust bearing and the deep groove ball bearing isolate stator and rotor parts and transmit loads; the deep groove ball bearing is mounted in the bearing cover; the cooling coil is fixed on the bearing body; the fan is arranged above the bearing cover, and the bearing cover and the bearing body are fixed together. The double-cooling system solves the problems that the bearing slips and is abraded due to too small axial load at the moment of starting and the upper deep groove ball bearing lacks effective lubrication at the moment of starting, and the double-cooling system can stop the supply of cooling water in the cooling coil pipe in a low-load and low-temperature environment, so that the aim of saving energy and water is fulfilled.

Description

TECHNICAL FIELD

[0001] The utility model relates to a high temperature molten salt pump bearing body structure, especially relates to a high temperature molten salt pump bearing body structure for frequent starting vertical type which solves the problem of skidding and wear caused by too small axial load of bearing at starting moment, the problem of lack of effective lubrication of upper deep groove ball bearing at starting moment and the problem of stopping the supply of cooling water in cooling coil of double cooling system under low load and low temperature environment. BACKGROUND

[0002] The molten salt pump is a pump specially used for conveying high-temperature binary or ternary molten salt. It is used for conveying high-temperature nitrate and nitrite, and is also widely used in melamine, salt making, alkali making and urea chemical processes. The temperature of the conveying medium is usually between 300 DEG C and 600 DEG C. The device is an important equipment in solar thermal power generation, molten salt energy storage and molten salt reactor. The power generation capacity of solar thermal power generation changes all the time due to the influence of many factors such as light intensity, radiation intensity, sunshine duration and cloud layer. As the main equipment for conveying and storing heat medium in the solar power generation system, the molten salt pump needs to adjust the operating condition at any time according to the system requirement, has the characteristics of wide operating range and frequent start and stop, and the bearing body of the molten salt pump, as an important part for supporting the rotor part of the molten salt pump, has problems such as complex and variable working load, short bearing life, large vibration and large energy consumption in actual operation. SUMMARY

[0003] In view of the above problems, the main purpose of the utility model is to provide a high temperature molten salt pump bearing body structure for frequent starting vertical type, which solves the problem of skidding and wear caused by too small axial load of bearing at starting moment, the problem of lack of effective lubrication of upper deep groove ball bearing at starting moment and the problem of stopping the supply of cooling water in cooling coil of double cooling system under low load and low temperature environment.

[0004] The utility model solves the above technical problem through the following technical scheme: a high temperature molten salt pump bearing body structure for frequent starting vertical type, the high temperature molten salt pump bearing body structure for frequent starting vertical type includes: double bearing structure and double cooling structure, the double bearing structure includes thrust bearing and deep groove ball bearing, and the double cooling structure includes fan and cooling coil.

[0005] The thrust bearing and the deep groove ball bearing are in interference connection with the bearing support, the thrust bearing and the deep groove ball bearing isolate the rotor parts and transfer the load, and the deep groove ball bearing is installed in the bearing cover.

[0006] The cooling coil is fixed on the bearing body, cooling water flows in the cooling coil, the fan is arranged above the bearing cover, and the bearing cover and the bearing body are fixed together.

[0007] In the embodiment of the utility model, bearing support and adjusting nut are fixedly connected together, adjusting nut and shaft are connected through thread, and torque is transmitted through key, and fan is fixedly connected with adjusting nut, bearing support, adjusting nut and fan rotate together with shaft, and butterfly spring, deep groove ball bearing and bearing cover are arranged on the contact surface of thrust bearing and bearing body.

[0008] In the embodiment of the utility model, bearing cover and bearing body are fixed through fixing bolt, and O-shaped ring is used to seal lubricating oil.

[0009] In the embodiment of the utility model, cooling coil is fixed on bearing body through welding.

[0010] In the embodiment of the utility model, fan is matched with fan cover, and fan cover is fixedly connected with bearing body through butterfly bolt.

[0011] In the embodiment of the utility model, shaft drives bearing support, fan and adjusting nut to rotate when rotating, and bearing support is provided with inclined oil supply hole and trapezoidal oil collecting groove.

[0012] In the embodiment of the utility model, butterfly spring is arranged on the lower part of thrust bearing, and wave spring is arranged on the upper part of deep groove ball bearing.

[0013] In the embodiment of the utility model, adjusting nut and bearing support are fixedly connected through locking screw, and shaft and bearing support are fixedly connected through key.

[0014] In the embodiment of the utility model, fan and adjusting nut are fixedly connected through snap ring.

[0015] The utility model discloses a bearing body structure for frequent starting vertical high-temperature molten salt pump, which has the advantages that the utility model solves the problem of slippage and wear caused by too small axial load of the bearing at the starting moment, the problem of lack of effective lubrication of the upper deep groove ball bearing at the starting moment, and the double cooling system can stop supplying cooling water in the cooling coil under low load and low temperature environment to achieve the purpose of energy saving and water saving. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole structure schematic diagram of the utility model.

[0017] Figure 2 It is the whole structure schematic diagram of the utility model. Figure 1 It is the local amplification schematic diagram of A place in the utility model.

[0018] Figure 3 It is the local amplification schematic diagram of B place in the utility model. Figure 1 ​

[0019] The following is the name corresponding to the label in the utility model:

[0020] Fan cover 1, fan 2, adjusting nut 3, bearing support 4, bearing cover 5, bearing body 6, thrust bearing 7, cooling coil 8, shaft 9, snap ring 10, locking screw 11, key 12, wave spring 13, fixing bolt 14, butterfly bolt 15, O-ring 16, deep groove ball bearing 17, butterfly spring 18. DETAILED DESCRIPTION

[0021] The preferred embodiments of the utility model are described in detail below with reference to the drawings, so as to illustrate the technical scheme of the utility model.

[0022] Figure 1 It is the whole structure schematic diagram of the utility model, Figure 2 It is the utility model in Figure 1 It is the local enlarged schematic view of A place, Figure 3 It is the utility model in Figure 1 B place local enlarged schematic view, as Figures 1-3 The utility model discloses a kind of bearing body structure for frequently starting vertical high-temperature molten salt pump, which includes fan cover 1, fan 2, adjusting nut 3, bearing support 4, bearing cover 5, bearing body 6, thrust bearing 7, cooling coil 8, shaft 9, snap ring 10, locking screw 11, key 12, wave spring 13, fixing bolt 14, butterfly bolt 15, O-ring 16, deep groove ball bearing 17, butterfly spring 18.

[0023] Bearing support 4 and adjusting nut 3 are fixedly connected together by locking screw 11 in the utility model, adjusting nut 3 is connected with shaft 9 by thread, and torque is transmitted by key 12, fan 2 is connected and fixed with adjusting nut 3 by snap ring 10, the above parts are rotating parts, rotate with shaft 9 together.Thrust bearing 7 and deep groove ball bearing 17 are connected with bearing support 4 by interference, isolate stator parts and transmit load.Deep groove ball bearing 17 is installed in bearing cover 5, is positioned by wave spring 13, thrust bearing 7 is installed in bearing body 6, and disc spring 18 is installed between the two, cooling coil 8 is welded on bearing body 6, internal cooling water is passed, bearing cover 5 and bearing body 6 are fixed by fixing bolt 14, and O-ring 16 is used to seal lubricating oil, form closed lubricating oil chamber, fan cover 1 is fixed with bearing body 6 by butterfly bolt 15, convenient to disassemble.

[0024] The butterfly spring 18 and the wave spring 13 provide additional pre-tightening force when the working condition of the equipment changes and the bearing load is reduced and cannot meet the requirement of the minimum running load of the bearing, so that the requirement of normal operation of the bearing is met, the situation of slipping and wearing of the bearing is prevented, and the reliability of bearing operation and the ability of adapting to complex working conditions are improved.

[0025] When the shaft 9 rotates, the bearing support 4, the fan 2 and the adjusting nut 3 are driven to rotate together, the inclined oil supply hole on the bearing support 4 draws out lubricating oil from the oil chamber under the action of centrifugal force, and lubricating oil and circulating cooling are provided for the thrust bearing and the deep groove ball bearing; the trapezoidal oil collecting groove is arranged on the bearing support 4, and lubricating oil is stored in the trapezoidal oil collecting groove, so that the stored oil in the trapezoidal groove provides lubrication for the bearing at the starting moment of the rotor, the bearing wear is reduced, and the service life of the bearing is improved.

[0026] The heat generated by the bearing work is circulated and transmitted to the cooling coil 8 and the bearing body 6 by the lubricating oil, and the heat is taken away by heat exchange of cooling water and the fan 2, so that the heat balance of the bearing work is ensured. When the molten salt pump is operated at low speed or the environmental temperature is lower than 0 DEG C, the supply of cooling water in the cooling coil can be stopped, the bearing can be continuously kept in heat balance by the fan 2, the running requirement is met, the energy-saving and water-saving effect is achieved, the fan cover 1 is fixed with the bearing body 6 through the butterfly bolt 15, the butterfly bolt 15 can be manually disassembled and fastened due to the special structure, and on-site maintenance is facilitated.

[0027] The utility model solves the problem that the bearing appears slipping and wearing due to too small axial load at the starting moment, the problem that the upper deep groove ball bearing lacks effective lubrication at the starting moment, and the double cooling system can stop the supply of cooling water in the cooling coil at low load and low temperature environment, so that the energy-saving and water-saving effect is achieved.

[0028] The basic principle and main features of the utility model and the advantages of the utility model are shown and described. It should be understood by those skilled in the art that the utility model is not limited by the above examples, and the above examples and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed, and the scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A bearing body structure for a vertical high temperature molten salt pump for frequent starts, characterized by: The bearing body structure for frequently starting vertical high-temperature molten salt pump comprises a double-bearing structure and a double-cooling structure; the double-bearing structure comprises a thrust bearing and a deep groove ball bearing, and the double-cooling structure comprises a fan and a cooling coil; The thrust bearing and the deep groove ball bearing are in interference connection with a bearing support, and the thrust bearing and the deep groove ball bearing isolate rotor parts and transmit loads; the deep groove ball bearing is installed in a bearing cover; The cooling coil is fixed on the bearing body, cooling water is passed through the inside of the cooling coil; the fan is arranged above the bearing cover, and the bearing cover and the bearing body are fixed together.

2. The bearing body structure for a high-temperature molten salt pump for frequent start-up according to claim 1, characterized by: The bearing support and an adjusting nut are fixed together, the adjusting nut is in threaded connection with a shaft, torque is transmitted through a key, and the fan is fixedly connected with the adjusting nut; the bearing support, the adjusting nut and the fan rotate together with the shaft; a butterfly spring is arranged on a contact surface between the thrust bearing and the bearing body, and a wave spring is arranged between the deep groove ball bearing and the bearing cover.

3. The bearing body structure for a high-temperature molten salt pump for frequent start-up according to claim 2, characterized by: The bearing cover and the bearing body are fixed through fixing bolts and are sealed with O-rings to lubricating oil.

4. The bearing body structure for a high-temperature molten salt pump for frequent start-up according to claim 1, characterized by: The cooling coil is fixed on the bearing body through welding.

5. The bearing body structure for a high-temperature molten salt pump for frequent start-up according to claim 1, characterized by: The fan is provided with a fan cover, and the fan cover is fixedly connected with the bearing body through butterfly bolts.

6. The bearing body structure for a high-temperature molten salt pump for frequent start-up according to claim 2, characterized by: When the shaft rotates, the bearing support, the fan and the adjusting nut rotate together; the bearing support is provided with an inclined oil supply hole and a trapezoidal oil collecting groove.

7. The bearing body structure for a frequently started vertical high-temperature molten salt pump according to claim 1, characterized by: The thrust bearing is provided with a butterfly spring at the lower part and a wave spring at the upper part.

8. The bearing body structure for a high-temperature molten salt pump for frequent start-up according to claim 2, characterized by: The adjusting nut and the bearing support are fixedly connected through locking screws, and the shaft and the bearing support are fixedly connected through a key.

9. The bearing body structure for a high-temperature molten salt pump for frequent start-up according to claim 8, characterized by: The fan and the adjusting nut are fixedly connected through a snap ring.

Images